MRI and CT produce different types of images and are selected for different clinical questions. Preparation should follow the imaging centre's instructions for the exact examination booked.
Tell the team about safety-relevant information
For MRI, disclose implants, pacemakers, metal fragments and previous operations. Bring implant details if available; do not decide for yourself that an implant is safe. For either examination, mention possible pregnancy, kidney problems, allergies and previous reactions to contrast. CT uses ionising radiation, so the reason for the examination and relevant precautions should be discussed.
Ask whether contrast is planned
Some examinations use a contrast agent to improve the information obtained. Ask whether you need blood tests, fasting or specific medicine instructions beforehand. Do not stop treatment on your own. Tell the centre if you have had a previous contrast reaction and describe what happened.
Discuss anxiety or difficulty lying still
MRI can be noisy and enclosed. Tell the team about claustrophobia, pain or any difficulty remaining still before the appointment. They can explain available support and whether additional arrangements are needed. If medication for relaxation is planned, ask about an escort and driving restrictions.
Bring the clinical context
Take the referral, previous scans and reports. Ask when a radiologist's report will be available and which clinician will interpret it with you. More detailed imaging is not automatically the right next test for every symptom. The choice should answer a defined question and lead to a useful care decision, with preparation and follow-up clearly explained.
Sources & further reading
International resources provide background information. Your clinician can explain the approach, screening schedule and requirements relevant to you in India.
General information cannot diagnose a condition or replace personal medical advice. For severe or rapidly worsening symptoms, seek urgent medical care.
The archive date organises this collection. This guide was first published on 29 October 2026.
